Noctua unveiled a prototype fin-stack heatsink for very large CPU socket types, such as Intel Socket P (LGA3647) and AMD SP3, powering chips such as Intel Xeon Phi "Knights Landing," and upcoming AMD Opteron SP3 32-core SoCs. There will be 3U and 4U versions of this heatsink, supporting NF-A9 (92 mm) and NF-F12 (120 mm) fans. The heatsink is just a very large aluminium fin-stack, to which heat drawn from the base is fed by seven 8 mm thick nickel-plated copper heat pipes.